New Positions
5 managers initiated
Top five by reported value
- CITADEL ADVISORS LLC$122.5K
- TWO SIGMA INVESTMENTS, LP$18.5K
- MORGAN STANLEY$14.1K
- UBS Group AG$2.4K
- BNP PARIBAS ARBITRAGE, SNC$424
Aptorum Group Ltd NASDAQ NMS - GLOBAL MARKET:APM
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
5 new0 added2 reduced1 exited
Total Institutional Holders
7
as of 2025-12-31
Top Holder
CITADEL ADVISORS LLC
$122.5K
Largest QoQ Increase
CITADEL ADVISORS LLC
+115,584 sh
Largest QoQ Decrease
CITIGROUP INC
-277 sh
New Positions(5)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | 115,584 | +115,584 | $122.5K | +$122.5K | — |
| TWO SIGMA INVESTMENTS, LP | 17,411 | +17,411 | $18.5K | +$18.5K | — |
| MORGAN STANLEY | 13,300 | +13,300 | $14.1K | +$14.1K | — |
| UBS Group AG | 2,247 | +2,247 | $2.4K | +$2.4K | — |
| BNP PARIBAS ARBITRAGE, SNC | 400 | +400 | $424 | +$424 | — |
Reduced(2)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| ADVISOR GROUP HOLDINGS, INC. | 5,501 | 0 | $5.8K | -$5.0K | 0.0% |
| SBI Securities Co., Ltd. | 7 | 0 | $7 | -$7 | 0.0% |
Sold Out(1)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| CITIGROUP INC | 0 | -277 | $0 | -$560 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| CITADEL ADVISORS LLC | 115,584 | $122.5K | +115,584 | — |
| TWO SIGMA INVESTMENTS, LP | 17,411 | $18.5K | +17,411 | — |
| MORGAN STANLEY | 13,300 | $14.1K | +13,300 | — |
| ADVISOR GROUP HOLDINGS, INC. | 5,501 | $5.8K | 0 | 0.0% |
| UBS Group AG | 2,247 | $2.4K | +2,247 | — |
| BNP PARIBAS ARBITRAGE, SNC | 400 | $424 | +400 | — |
| SBI Securities Co., Ltd. | 7 | $7 | 0 | 0.0% |
New & Closed Positions this quarter
Closed Positions
1 managers exited
Top five by prior-quarter value
- CITIGROUP INC$560
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for APM against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.